Previously, an authorized Harley-Davidson dealer was required to complete these software uploads. The revised Street Performance Tuner also gives the owner the ability to view and clear ECM trouble codes, and to collect real-time vehicle data, which can then be displayed on a computer screen. Finally, Harley-Davidson has lowered the suggested retail price of the Street Performance Tuner to $249.95.

With the Street Performance Tuner, the Harley-Davidson owner can install factory-calibrated ECM software that will deliver the best all-around performance for a specific model and its state of tune after EPA-compliant performance modifications are made to EFI-equipped Harley-Davidson models.

The kit also includes the Vehicle Communications Interface (VCI) module that records up to 15 minutes of run-time data on up to 27 variables that can be downloaded to a PC. Using the included software, the motorcycle owner or a technician can evaluate engine operating parameters such as the air/fuel ratio, O2 sensor readings, engine speed and temperature, RPM and vehicle speed, throttle position, spark advance, and many more performance characteristics of the motorcycle. The VCI will also record and display service codes for troubleshooting and diagnostics.